body, html {
    margin: 0;
    padding: 0;
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    color: #333;
    line-height: 1.6;
}

.landing-container {
    max-width: 100%;
    overflow-x: hidden;
}

.hero {
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('https://images.unsplash.com/photo-1542273917363-3b1817f69a2d?auto=format&fit=crop&w=1200&q=80');
    background-size: cover;
    background-position: center;
    height: 60vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: white;
    padding: 0 20px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    font-weight: 800;
}

.hero .subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

.content {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

.intro {
    text-align: center;
    margin-bottom: 50px;
}

.guide-link {
    margin-top: 20px;
    color: #007bff;
    font-size: 0.9rem;
}

.intro h2 {
    font-size: 2rem;
    color: #1a1a1a;
    margin-bottom: 20px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 12px;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card h3 {
    margin-top: 0;
    color: #007bff;
}

footer {
    border-top: 1px solid #eee;
    padding: 30px 20px;
    text-align: center;
    font-size: 0.9rem;
    color: #888;
}